New climate dataset from Mazovia (Central Poland) from the late 19th century as a basis for estimating the urban effect in multi-year trends in air temperature in Poland
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Date
2026
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Springer Nature
Abstract
The paper examines changes in thermal conditions in Płońsk and Warsaw (central Poland) between the end of the 19th century and the beginning of the 21st century. The study uses four air temperature datasets: newly found and digitised dataset from Płońsk from a period 1881–1895, a dataset from the Institute of Meteorology and Water Management – National Research Institute (IMGW-PIB) weather station in Poświętne from a period 1985–2014 and two datasets from the Astronomical Observatory in Warsaw from the same periods as in Płońsk and Poświętne. The increase in Tmean of 1.9 °C was found in Płońsk between 1881 and 1895 and 2000–2014. The longest spell of days with a statistically significant warming was identified in Płońsk in late July – early August (spell of twelve consecutive days). The increase in air temperature in Warsaw was 0.4 °C higher than in Płońsk and this is believed to be the effect of urbanization. A significant reduction in a duration of the thermal winter (a reduction of 27 days in Płońsk and 34 days in Warsaw) and extending of the summer were detected as well as the shift in the timing of transitional seasons.
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Theor Appl Climatol 157, 97 (2026)